Silhouette Momentum Chassis Rimless 5529 EyeglassesSilhouette Momentum 5529 Eyeglasses Chassis made by Silhouette are Unisex Eyeglasses. They have a Butterfly shape, and come in 7 colors, which are black, blue, brown, gold, grey, red, and violet with 6 sizes, which are 17_135, 17_140, 19_140, 19_145, 21_140, and 4820. Whats included with the silhouette chassis? The silhouette chassis includes the bridge and temples and does not come with demo lenses. Its designed to be fitted with prescription lenses.